News and Events

Updated 10 December 2015

Permafrost Thaw Causes Lake Drainage and Flow of Debris, Peel Plateau, Northwest Territories, Canada

Permafrost thaw in the northwestern Northwest Territories has caused development of very large thaw slumps. Individual thaw slump disturbances can impact over 30 ha of terrain, displace millions of cubic metres of sediments to reconfigure slopes and impact downstream environments. One particular thaw slump about 20 km northwest of Fort McPherson has been growing for about a decade. It has caused gradual hillside collapse, resulting in the rapid, partial...